help pylint by explicitely defining some attributes
* the logging functions automatically set by set_log_methods
* the attributes of Hook classes (eidfrom, entity...):
#! /bin/sh -e#if [ "$1" = remove -o "$1" = upgrade ]; then if which install-docs >/dev/null 2>&1; then install-docs -r cubicweb-doc fifi#DEBHELPER#exit 0